I think that EU should have two types of game-modes. First would be sort of sand-box like game, much like EU3, in which you could select any tiny faction, conquer an empire, and go on unrestricted, and the AI factions would be free to do whatever their AI-scripts conceive. The second game mode would make some OPMs extremely hard (even unplayable if necessary) and would also restrict AI behavior according to strict historical precedence.
Basically two kinds of modes: a very historically accurate, heavily scripted campaign, and a freer possibly wildly implausible sand-box adventure.
Basically two kinds of modes: a very historically accurate, heavily scripted campaign, and a freer possibly wildly implausible sand-box adventure.